A local resident walks near an apartment building destroyed during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 31, 2022. REUTERS/Alexander Ermochenko 

Relatives and friends mourn next to the coffin of Private Volodymyr Dukh, 29, who was killed in battle amid Russia’s attack on Ukraine, at the Lychakiv cemetery, in Lviv, April 1, 2022. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY 

A man walks past a burning gas pipeline that was hit during shelling from Russian positions in a neighbourhood in northern Kharkiv as Russia's attack on Ukraine continues, Ukraine, March 31, 2022. REUTERS/Thomas Peter TPX IMAGES OF THE DAY 

A view shows residential houses destroyed by shelling, as Russia's attack on Ukraine continues, in the village of Hostomel, in Kyiv region, Ukraine March 31, 2022. REUTERS/Oleksandr Klymenko 

Andrei Liutov,15, cries as he embraces the portrait of his father Vlad Liutov, 46, a martial arts instructor who joined the territorial defense and died during a rocket strike on the regional administration building on Tuesday, during the funeral, as Russia's invasion of Ukraine continues, in Mykolaiv, Ukraine April 1, 2022. REUTERS/Nacho Doce 

A local resident rides a bicycle past an apartment building damaged during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 31, 2022. REUTERS/Alexander Ermochenko 

Relatives and friends mourn as Ukrainian soldiers carry the coffin of Private Volodymyr Dukh, 29, who was killed in battle amid Russia?s attack on Ukraine, during a funeral ceremony at the Saints Peter and Paul Garrison Church, in Lviv, April 1, 2022. REUTERS/Alkis Konstantinidis 

Windows that were broken during the shelling amid Russia's ongoing invasion of Ukraine, are pictured in Irpin, Ukraine March 31, 2022. REUTERS/Zohra Bensemra 

A bomb crater and a destroyed residential house are seen in a village near a frontline, as Russia's attack on Ukraine continues, in Kyiv Region, Ukraine March 31, 2022. REUTERS/Serhii Nuzhnenko 

A Ukrainian service member smokes during a shelling, as Russia's attack on Ukraine continues, at a position in Kyiv Region, Ukraine March 31, 2022. REUTERS/Serhii Nuzhnenko 

Grandmother Maria and mother Kateryna react near a coffin with the body of 18-year-old Viktor Karichak, who died during the war, amid Russia's invasion of Ukraine, in Mukachevo, Ukraine, April 1, 2022. REUTERS/Serhii Hudak 

A Ukrainian service member inspects destroyed Russian BTR-82 armoured personal carrier (APC) in a village near a frontline, as Russia's attack on Ukraine continues, in Kyiv Region, Ukraine March 31, 2022. REUTERS/Serhii Nuzhnenko 

Parts of ammunition and shell casings lie next to a destroyed car in a residential area during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 31, 2022. REUTERS/Alexander Ermochenko 

A Ukrainian service member holds Kalashnikov AK-12 captured from Russian troops, as Russia's attack on Ukraine continues, at a position in Kyiv Region, Ukraine March 31, 2022. REUTERS/Serhii Nuzhnenko 

Local residents stand next to a building damaged during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 31, 2022. REUTERS/Alexander Ermochenko 

Local residents play chess outside an apartment building damaged during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 31, 2022. REUTERS/Alexander Ermochenko 

Service members from Chechen Republic are seen on positions during fighting in Ukraine-Russia conflict in the city of Mariupol, Ukraine March 31, 2022. REUTERS/Chingis Kondarov 

A boy is seen outside an apartment building damaged during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 31, 2022. REUTERS/Alexander Ermochenko 

Zamid Chalaev regiment commander from Chechen Republic fires an automatic grenade launcher during fighting in Ukraine-Russia conflict in the city of Mariupol, Ukraine March 31, 2022. REUTERS/Chingis Kondarov 

A view shows a residential area damaged by shelling, as Russia's attack on Ukraine continues, in the village of Hostomel, in Kyiv region, Ukraine March 31, 2022. REUTERS/Oleksandr Klymenko 

A view shows a residential house destroyed by shelling, as Russia's attack on Ukraine continues, in the village of Hostomel, in Kyiv region, Ukraine March 31, 2022. REUTERS/Oleksandr Klymenko 

Ukrainian service members rest in the village of Hostomel amid Russia's attack on Ukraine continues, in Kyiv region, Ukraine March 31, 2022. REUTERS/Oleksandr Klymenko 

A local resident pushes a cart past a building damaged during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 31, 2022. REUTERS/Alexander Ermochenko 

Ukrainian refugees wait in line to cross the Ukraine-Poland border, after fleeing the Russian invasion of Ukraine, outside the border crossing checkpoint in Shehyni, Ukraine, March 31, 2022. REUTERS/Hannah McKay TPX IMAGES OF THE DAY 

A local resident carries a cage while walking past an apartment building destroyed during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 31, 2022. REUTERS/Alexander Ermochenko 

An emergency service member rests next to the bodies of civilians killed by Russian shelling before they are transferred to a mortuary, after bodies were collected from different locations, amid Russia's invasion on Ukraine, in Irpin, Ukraine March 31, 2022. REUTERS/Zohra Bensemra 

A car which was damaged during the shelling, amid Russia's invasion on Ukraine is pictured at the house courtyard, in Irpin Ukraine March 31, 2022. REUTERS/Zohra Bensemra 

Ukrainian refugee Katya, from Irpin, shelters her dog Martin from the rain as she waits in line to cross the Ukraine-Poland border, after fleeing the Russian invasion of Ukraine, outside the border crossing checkpoint in Shehyni, Ukraine, March 31, 2022. REUTERS/Hannah McKay 

Smoke rises from a residential building after shelling from Russian positions in northern Kharkiv as Russia's attack on Ukraine continues, Ukraine, March 31 2022. REUTERS/Thomas Peter 

A thermometer is seen on the ground next to the broken windows of houses after a military strike hit the neighborhood, as Russia's invasion of Ukraine continues, in Mykolaiv, Ukraine, March 31, 2022. REUTERS/Nacho Doce 

A Ukrainian refugee waits in line to cross the Ukraine-Poland border, after fleeing the Russian invasion of Ukraine, outside the border crossing checkpoint in Shehyni, Ukraine, March 31, 2022. REUTERS/Hannah McKay 

Damage after shelling is seen, amid Russia's invasion of Ukraine, in Velika Danylivka neighborhood of Kharkiv, Ukraine, March 31, 2022. REUTERS/Oleksandr Lapshyn 

Valentyn, 83, the last local resident who stayed in a village near a frontline, as Russia's attack on Ukraine continues, stands inside of his house in Kyiv Region, Ukraine March 31, 2022. REUTERS/Serhii Nuzhnenko TPX IMAGES OF THE DAY